Format option not working when used inside an sql query python

Question

I have to write an sql query using the .format option in python. I am using the follwoing code which doesnt work as I expected.

alarm_tables = ["treevashialarm","treekhopolialarm","treetalegaonalarm"]
alarm_types = ['As%%','Sd%%','Multi%%']

Here is my query:

query_types = "SELECT \"alarmSeverity\", COUNT(*) FROM " + "'{0}'" + " WHERE isparent = true and eventdate+eventtime BETWEEN TIMESTAMP " + "'{1}" + "T18:30:00.000Z' " + " and TIMESTAMP " + "'{2}" + "T18:29:59.999Z' " + "and eventtype like '{3}' group by \"alarmSeverity\""

I am using the format option as below:

for i in alarm_tables:
    for j in alarm_types:
        query_types.format(i,'2019-10-01','2019-10-02',j)
        print(query_types)

I am getting an output as below :

SELECT "alarmSeverity", COUNT(*) FROM '{0}' WHERE isparent = true and eventdate+eventtime BETWEEN TIMESTAMP '{1}T18:30:00.000Z'  and TIMESTAMP '{2}T18:29:59.999Z' and eventtype like '{3}' group by "alarmSeverity"

My one of the Expected output is as below:

SELECT "alarmSeverity", COUNT(*) FROM treevashialarm WHERE isparent = true and eventdate+eventtime BETWEEN TIMESTAMP '2019-10-09T18:30:00.000Z' AND TIMESTAMP '2019-10-10T18:29:59.999Z' and eventtype like 'As%' group by "alarmSeverity";

How can I get the desired output.Why is format not working.Is there a work around.The for loop doesnt work as well.It gives random output at random time.

Any help is appreciated!

smci · Accepted Answer · 2021-04-19 20:24:56Z

4

format() doesn't modify the original string:

so if you want to do this you have to write:

query_types_formated = query_types.format(i,'2019-10-01','2019-10-02',j)

edited Apr 19, 2021 at 20:24

smci

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answered Oct 15, 2019 at 9:21

Maxime

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2 Comments

Fasty Over a year ago

I tried that as well earlier,but for loop was not working :O weird eh? .Anyway now it works.Thanks a bunch! :)

Maxime Over a year ago

@RAMSHANKERG I'm guessing you tried with query_types = query_types.format(...), so the first loop was okay but the second one broke because your query_types was not a formatable string anymore since you replaced it ?

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